here's the LG G4 display connection line paths is case you are going to troubleshoot display problem such blank display, dark screen display, white screen (with tones), No backlight LED that is resulted from due to wet damaged or accidentally dropped issues bu the users.

Problems

Blank display on oppo LG G4

Lines on Display screen.

Abnormal Colors on oppo LG G4 display screen.

डिस्प्ले स्क्रीन blank हो जाना |

डिस्प्ले स्क्रीन पर लाइन दिखाई देना |

डिस्प्ले स्क्रीन white दिखाई देना |

Reasons of Problems

LCD screen of LG G4 has gone through some sort of physical damage (most of the time this is the case of Display problems in LG G4 ).

LCD screen of phone or the phone itself might have encountered any kind of water damage.

Software is outdated.

Display connector might be loose, causing any of the above mentioned problems in your phone’s screens.

LCD might be faulty itself, and you need to change that in order to overcome this issue.